Tape cutting device



T. L. MURRAY TAPE CUTTING DEVICE Filed 001',- l. 1956 merited-Aug. 2,1938 a I I UNITED STATES PATENT OFFICE- TAPE corms nnvrcn Thomas L.Murray, New Rochelle, N. Y.

Application October 1, 1936, Serial No. 103,495

" 8 Claims. (cl. 206-.59)

This invention relates to a tape cutting device along its freelongitudinal edge with a depending and particularly to a cutting devicefor use with flange 2%, for a purpose to be hereinafter dereels ofadhesive tape. scribed. Extending from each end of the lower Theprincipal object of this invention relates wall 23 is a clamping leg 26provided with an 5 to the design of said cutting device which is sointermediate loop 27; the legs 26 being arranged 5 constructed as to beadapted for removable p r ll l o h h r n p je in wnw rdl clampingengagement to the id s of the reel in in vertical relation to said lowerwall 23. The superposed relation to the roll of tape wound loops 2iconnect the le s 5 th the lower Wall thereon and which device is of suchform as 23 and are so formed as to project outwa l m not to interferewith the positioning of the reel beyond t plane of Said legs, W theinside within its container. walls of said loops being spaced from thetrans- Other objects 01 the invention relate to the Verse edges of theupp Wa as Clearly knife-edge construction of the device; to the w P eera ly the upper and lower walls 2 sliding guard for said knife-edge; tothe spring hend w ll Clamping s 26 n loops 21 are construction formaintaining said guard over said integrally formed from a Single unitaryank w knife-edge; to the simple and cheap construction of sheet metalwith the parts thereof bent into oi the device as a whole; to the simpleand auto- Shape in the manner readily pp roman matic operation of thesame and to the simple inspection f Fi r 4. n order to insure the mannerin winch the d vi e i applied t d cutting device against falling fromthe reel while removed from the real. it is being turned, each of theclamping legs 26 29 Further objects of the invention will appear a thejuncture thereof with e s is irom the following description taken inconnecprovided all its Side edges With w d y directed tion with thedrawing which forms a part of this 1 W f rm y n hin aid clamping legsspecification, and m which; as at th and bending the corners thus formed535 Figure 1 is a from; elevatinnal View partly in inwardly a slightdistance as clearly shown in section of a reel ofadhesive tape withinits, (2011- Figure Thus, with the device assembled o he mi d showing thcutting device mnunted] reel i i, the lugs 28 will resiliently andfrictionally n aid re l; engage under the beads in of the reel fittedwith- Figure 2 39 t View of th y and cutting in the loops ii to securelyhold the cutting device go device; in position. 7 30 Figure 3 i mnSectional w at the The free longitudinal edge of thelower wall 23andcutting device taken on line t-t, Figure is sharpened to define aknife-edge 29 which as 2; a d shown is located forwardly of thecorresponding Figure 4 is a perspective view with parts edge of theupper wall 22. Arranged for sliding moved of th cutting device movementbetween the walls 22 and 23 is a guard Referring to Figure 1, it denotesa roll oi ad- M of the Same length as t pper Wall 2 The hesive tapewound on a reel ill which is placed guard m is provided With a ra nitudinal within the cylindrical container it. The reel channel 39 havingpaced vertical walls 32 and ill comprises a hub it and side walls M eacht. the d p of d n l s's as to in having a circular peripheral head it.The reel accommodate the end fl e 2501? the upper Wall M, container itand adhesive tape it are or con- Formed on inside e po tion of theventional standardized design. In'order to perguard at a e i e d p -e 35in each of which nut of ease of applying the container l2 to the isplaced q end of coil pr 36 with the reel it one edge of the container isprovided with other end abutting the end Wall each p g an outwardlyturned head it while the other edge being a apted to react between theend wall 24 is m th an inwardly turned head H and bottom of said pocketto constantly urge the which acts as a stop for the reel ii as thesameguard it in an outwardly direction. Outward is moved sideways into thecontainer. movement of the guard 30 is limited by th The cuttingdeviceit is arranged to'extend gagement 0 the d flange 25 with the inside Ibetween the side walls It of the reel Ii and comchannel wall 32. Theoutside edge portion of the 50 prises a body portion-2i having spacedapart rd 30 n the rm position of the same upper and lower walls 22 and23, respectively, projects over the knife-edge 29, said outsideedgeintegrally joined along one longitudinal edge by portion beingpreferably ed as at 31. the end wall 24. The upper wall 22 is of lessThe cutting device is appliedto the reel ll width than the lower wall 23and is provided by snapping the same across the side walls l4, l5

the legs 26 frictionally contacting the outside surfaces of said sidewalls, and said device being so positioned that the beads I5 are fittedwithin the loops 2! as clearly shown in Figure 1.

Figure 3 shows the operation of the cutting device. The free end III"-of the adhesive tape I0 is pulled off of the reel for a selected length.With the reel held in one hand and the length of tape in the other thesame is pulled baekwardly against the guard 30 to move the same inwardlyagainst the action of the coil springs 36 to uncover the knife-edge 29.The transverse pull of the tape on said knife-edge will cut the samesmoothly and quickly. Upon the completion of the cut the guard 30 willmove outwardly to cover the knife-edge. Another method of cutting thetape when the tape has been unwound to a desired length while bandagingis to impart a quick twist of the wrist of the hand holding the reel.This movement will result in a quick and smooth severing of the tape.

While the cutting device as above described has been shown used with ,areel of adhesive tape it is to be understood that'the same may readilybe applied for use with any type of tape or ribbon. The principlesinvolved in this invention are susceptible of numerous otherapplications which will readily occur to persons skilled in the art. Theinvention is therefore to be limited as indicated by the scope of theappended claims.-

Having thus set forth and disclosed the nature of this invention, whatis claimed is:

1. A cutting device comprising spaced upper and lower walls joined alongone longitudinal edge by an end wall, said lower wall being of greaterwidth than said upper wall, a knife-edge formed on the free longitudinaledge of said lowor wall, a guard element for said knife-edge arrangedfor bodily transverse sliding movement between said upper and lowerwalls, spring means acting on said guard element to move the sameoutwardly, stop means carried by said upper wall and coacting with aportion of said guard elev ment to limit said outward movement,and'means associated with at least one 'of said walls for mounting saidcutting device on, a supporting structure.

2. A cutting device comprising spaced upper and lower walls, an end walljoining the same along one side edge thereof, said lower wall being ofgreater width than said upper wall and procoacting with a wall of saidchannel to limit said outward movement, and attaching means formed atthe transverse ends of said lower wall for mounting said cutting deviceon a supporting structure.

3. In the cutting device as set forth in claim 2; said guard elementincluding pockets formed on its inside edge portion in opposed relationto said end wall, and said spring means comprising coil springs seatedwithin said pockets and in engagement with said end wall, said coilsprings being under initial compression.

4. In the cutting device as set forth in claim 2; wherein said attachingmeans comprises depending parallel legs, and spring loop meansconnecting said legs with said lower wall.

5. In the cutting device as set forth in claim 2; said guard elementhaving a length equal to that of said knife-edge and normally maintainedunder the action of said spring means in over-lapping relation to saidknife-edge and adapted to uncover the same by the action thereon of amember to be cut by said knife-edge.

6. In combination with a roll of tape wound on a reel, a cutting devicecomprising a body portion, means on said body portion for clamping thesame to said reel, a knife-edge formed on said body portion, a slidingguard mounted on said body portion normally covering said knife-edge andadapted to be moved to a position uncovering the knife-edge by a pullingaction on a length of said tape to be cut from said roll acting againstsaid guard.

7. In combination with a roll of tape wound on a reel, a cutting devicecomprising a body portion defined by spaced upper and lower walls and anend wall joining the same, a knife-edge carried by said lower wall, asliding guard for said knife-edge positioned in said body portion,spring means within said body portion acting on said guard to move thesame outwardly, stop means on said body portion engaged by said guard tolimit both outward and inward movement thereof, leg means on said bodyportion for clamping said device to said reel with said knife-edgeparallel to the axis thereof; said guard normally covering saidknife-edge and adapted to uncover the same by a pulling action on alength of said tape to be cut from said roll acting against said guard.

8. In combination with a tape carrying spool, a cutting device attachedto the spool and having a cutting edge, a guard member oscillatablymounted upon the cutting device and having a portion adapted to coversaid cutting edge to guard the same, and resilient means normally urgingthe guard member into guarding position, said guard member when inguarding position extending beyond the cutting edge and adapted to beretracted by the tape as the latter is drawn toward and across thecutting edge.

THOMAS L. MURRAY.

